<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model.number="age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="gender">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addFn" v-if="isCheaked===true" >添加</button>
      <button @click="changeMsg"v-if='isCheaked===false'>修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr>
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, index) in list" :key="item.id">
          <td>{{ index + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.gender }}</td>
          <td>
            <button @click="delFn(item.id)">删除</button>
            <button @click="changeFn(index)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      id:'',
      isCheaked:true,
       list: JSON.parse(localStorage.getItem("list")) || []
    //  list: [
    //     {
    //       id: 1,
    //       name: "张三",
    //       age: 20,
    //       gender: "男",
    //     },
    //     {
    //       id: 2,
    //       name: "里斯",
    //       age: 18,
    //       gender: "男",
    //     },
    //     {
    //       id: 3,
    //       name: "王巧",
    //       age: 19,
    //       gender: "女",
    //     },
    //   ],
      ,
      name: "",
      age: "",
      gender: "男",
    };
  },
  computed: {},
  watch: {
    list: {
      handler(val) {
        localStorage.setItem("list", JSON.stringify(val ? val : []));
      },
      deep: true,
    },
  },
  methods: {
    changeMsg(){
        this.list[this.id].name=this.name;
        this.list[this.id].gender=this.gender;
        this.list[this.id].age=this.age;
          this.name = "";
          this.age = "";
          this.gender = "男";

    },
    changeFn(index){
      this.id=index;
      this.isCheaked=false;
      this.name=this.list[index].name;
      this.age=this.list[index].age;
      this.gender=this.list[index].gender;
      
    },
    addFn() {
      if (this.name.trim() && this.age !== "") {
        this.list.unshift({
          id: Date.now(),
          name: this.name,
          age: this.age,
          gender: this.gender,
        });
        console.log(this.list);
      } else {
        alert("输入的数据不能为空，请重新输入");
        return
      }
      this.name = "";
      this.age = "";
      this.gender = "男";
    },
    delFn(id) {
      this.list = this.list.filter((item) => item.id !== id);
    },
  },
  components: {},
};
</script>
